The world has no circumference. It would certainly have a circumference if it had a centre, in which case it would contain within itself its own beginning and end; and that would mean that there was some other thing which imposed a limit to the world - another being existing in space outside the world. All of these conclusions are false. Since, then, the world cannot be enclosed within a material circumference and centre, it is unintelligible without God as its centre and circumference.

Life and perfection, joy and repose and whatever all the senses desire, lie in the distinguishing spirit, and from it they have everything that they have. Even if the organs lose in power and the life in them decreases in activity, it does not decrease in the distinguishing spirit, from which they receive the same life, when the fault or infirmity is removed.

In creating the world, God used arithmetic, geometry, and likewise astronomy.

Time is to eternity as an image is to its exemplar, and those things which are temporal bear a resemblance to those things which are eternal.

Within itself the soul sees all things more truly than as they exist in different things outside itself. And the more it goes out unto other things in order to know them, the more it enters into itself in order to know itself.

Those, however, who saw that one cannot attain wisdom and perennial intellectual life, unless it be given through the gift of grace, and that the goodness of the Almighty God is so great that He hears those who invoke His name, and they gain salvation, became humble, acknowledging that they are ignorant, and directed their life as the life of one desiring eternal wisdom. And that is the life of the virtuous, who proceed in the desire for the other life, which is commended by the saints.

With the senses man measures perceptible things, with the intellect he measures intelligible things, and he attains unto supra-intelligible things transcendently.